php语言得用fsockopen()函数,实现脚本异步运行,代码如下
//异步请求函数(用debug参数若为true则为用为调试,开启调试可以看到异步的执行情况,但是失去异步的效果)

main.php


<?php
function request_by_fsockopen($url,$post_data=array(),$debug=false){
    $url_array = parse_url($url);
    $hostname = $url_array['host'];
    $port = isset($url_array['port'])? $url_array['port'] : 80;
    @$requestPath = $url_array['path'] ."?". $url_array['query'];
    $fp = fsockopen($hostname, $port, $errno, $errstr, 10);
    if (!$fp) {
        echo "$errstr ($errno)";
        return false;
    }
    $method = "GET";
    if(!empty($post_data)){
        $method = "POST";
    }
    $header = "$method $requestPath HTTP/1.1\r\n";
    $header.="Host: $hostname\r\n";
    if(!empty($post_data)){
        $_post = strval(NULL);
        foreach($post_data as $k => $v){
            $_post[]= $k."=".urlencode($v);//必须做url转码以防模拟post提交的数据中有&符而导致post参数键值对紊乱
        }
        $_post = implode('&', $_post);
        $header .= "Content-Type: application/x-www-form-urlencoded\r\n";//POST数据
        $header .= "Content-Length: ". strlen($_post) ."\r\n";//POST数据的长度
        $header.="Connection: Close\r\n\r\n";//长连接关闭
        $header .= $_post; //传递POST数据
    }else{
        $header.="Connection: Close\r\n\r\n";//长连接关闭
    }
    fwrite($fp, $header);
    //-----------------调试代码区间-----------------
    //注如果开启下面的注释,异步将不生效可是方便调试
    if($debug){
        $html = '';
        while (!feof($fp)) {
            $html.=fgets($fp);
        }
        echo $html;
    }
    //-----------------调试代码区间-----------------
    fclose($fp);
}

$data=array('name'=>'guoyu','pwd'=>'123456');
$url='http://localhost/test/other.php';
request_by_fsockopen($url,$data,true);//
?>

other.php

<?php
header("content-type:text/html;charset=utf-8");
//error_reporting(0);
//ini_set('html_errors',false);
//ini_set('display_errors',false);
$name = isset($_POST['name'])?$_POST['name']:'';
$pwd = isset($_POST['pwd'])?$_POST['pwd']:'';
echo $name.$pwd;
echo 'success ok';
die;
?>

使用实例:
[运行的main.php主脚本文件]
$data=array('name'=>'guoyu','pwd'=>'123456');
$url='http://localhost/test/other.php';
request_by_fsockopen($url,$data,true);//把应用B的用户表异步-同步数据

[导步执行文件other.php]
在other.php中便可以用$_POST接收main.php提交过来的参数，从而进行下一步操作
<?php

/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2019/8/22
 * Time: 11:54
 */
class 实现脚本异步执行
{

}